Istanbul and Sofia Time Zone Comparison
Istanbul and Sofia are two major cities that sit in noticeably different time zones. Istanbul is Turkey's largest city and historic capital, uniquely straddling Europe and Asia across the Bosphorus strait. Sofia, the capital of Bulgaria, is one of the oldest continuously inhabited cities in the Balkans and the country's largest economic center.
Because Istanbul and/or Sofia observe daylight saving time for part of the year, the gap between them isn't fixed — it ranges between 0 and 1 hours depending on the season.
With such a small gap, scheduling a call between Istanbul and Sofia is easy — a normal business-hours slot works for both sides on the same calendar day.